On 2014-01-29, William Sommerwerck wrote:
An active device provides signal amplification, or it uses amplification as
the basis of its operation. That has always been the definition.

That is fine, but you have to remember that amplification includes unity gain
(and below).

Is digital circuitry active? I'd say yes.

I would say that, as a category, no.

Counterexample:

http://en.wikipedia.org/wiki/Diode_logic